If anyone thought that Jiraiya could take on Itachi they’re in for a rude awakening! Back in the old days they kept implying that in a 1 on 1 fight Jiraiya would actually have a chance and maybe beat Itachi. No Way! Sage Mode is a formidable jutsu, but in the end Itachi is still superior. With Susanoo Itachi could easily defeat Jiraiya in an instant. Without it he could burn Jiraiya with Amaratetsu. He could also just beat him with plain sharingan. Jiraiya loses epicly. Itachi wins.